Rock-drill.



N0. 835,261. PATENTED NOV. 6, 1906.

0. J. SMITH.-

' ROGK DRILL. APPLIoATIoy FILED AUG. 12. 1905.

WITNESSES.

INVE/VTUR 16 azmlmmzzz M Arm/M757:

PATENIED Novgs, 1906.

c. J.-SMITH. ROCK DRILL. APPLICATION FILED AU G.12, 1905.

a gar 712 2 mmm" wN QM. N E

l- P E WITNESSES.

: assembledfor cleaning purposes or replac ng I UNITED srkrss PA ENT ortion.

CLARK J. SMITH, 0F OTTUMWA, 1owA,As's1cN0R To THE HARDSOCG WONDER DRILL COMPANY. OF OTTUMWA, IOWA. 4

ROCK-DRILL.

' Specificationof Letters Patent.

Patented. Nov. 6, 1906.

Application filed August 12. 1905.- Serial No. 278,930.

To all it may concern} Be it known that I, CLARK J .S ITH, residing atOttumwa, in the county of Wapello and State of Iowa, have invented certain new and useful Improvements in Rock-Drills, of

V which tlie following is a specification.

My invention relates to certain new and useful .im rovements in rock-drills and. it

I operated by placing the butt-end thereof against some solid abutmentas, for? instance, the side of a wall or roof or anything that-is solid enough to su port it in the position desired to drill, or t e drill can be used as a hand-drill unmounted, if desired.

My invention has for its object to provide a drill of this character of a very simple; and

effective construction which can be easily and cheaply manufactured and which will readily and eifectively serve its intended purposes and in which the parts are so constructed and arranged as to be readily separated or worn arts.

In its generic nature my inventioncomprises a hammer-casing, a pneumatic hammer reciprocally'mounted therein, a drillholding chuck held by the casing for receiving the drill, a pair of arms integrally formed a with a casing by means of which the same can be turned on its axial line, a fpiston secured to the hammer casing and rming a closure for one end thereof, which through which is in communication with the interior of the hammer-casing, a casing for ton and piston-casing together at times.

improved mount for the drill so arranged Again, my invention seeks to provide an that the operative mechanism of the drill can be swung clear of the drill when it is desired to change drills. I

With otherobjects in view than have heretofore been enumerated the invention also comprises certain novel construction, operation, combination, and arrangement of parts,

iston has a valve-controlledpassage longitu mallythere appended claims, reference being had to the accompanying drawings, in which Figure 1 1s a perspective vlew showing'my' invention as appliedfor use. Fi 2 is a similar vicw showing the position of t e parts just after the mechanism has been swung clear of the drill and after pullin the drill out of the all of which will be first described in'detail i and then-be specifically pointed out in the hole to change drills] ig. 3 is a vertical central longitudinal section ofmy invention.

Fig. 4 is a cross-section on the line 4 4 of Fig.- 3; Fig. 5 is a similar view on the line 5 5 of Fig. 3. Fig. '6' is ahorizontal section on the line 6 6 of Fig. 3, showing the iston and piston-casing locked-together. ig. 7 is a detail cross-section on the line7 7 of Fig. 3.

Beferringnow to the accompanying drawings, in which like numerals of reference indicate like arts in all of the figures, 1 designates the ammer-casing, which provided with a central bore including a chuck-receiving portion 1 to receive the drill-chuck 2, an internal rib 1 1 and internal annular channels 1 13-1 1 thechannels A 1? 1 being se arated by supplemental internal annular ri s 1 as shown. The hammer-casing also is provided with a pair of handle members 1 1 interally formed therewith, andan enlarged rib ortion 1 formed with an internal bore 1 W ch merges With the cross-bore 1, that communicates with the chamber 1, a' closure-' lug 1 being provided for the outer end of t e bore 1", as shown. The hammercas ing is also provided with a transverse-bore 1, that communicates with the bore 1 ,.and.

the bore 1 has its shoulder end closed by a screw-plug 1". Y

The hammer 3 ternal annular chamber 3*, which has radial "apertures at each end, numbered, respecg 'tively, 3 3, those 3 communicating with the chamberv 1 when in the forwardpos'ition has the usual head 4 I of its movement and with the chamber 1 I I when in the rear position,, while those 3 communicate with the chambers 1 1" as the hammer'mo'ves toward the otherlimit, of'its movement. I i

The hammer-casing 1' at its rear'end has its internal chamber provided with' internal threads 1, as shown, to receive, the threaded head 5 of the piston .5, which sc'rew too threaded and has a shoulder 5 "to,abu,t

screw-threaded portiont for a purpose presently understood. At the free end the pisof the drawings.

gitudinal bore '5 extending from end. to end, 1

the bore 5 being closed and out ofcominunication with the chamber l of the casing'l 1 and merging with a transverse groove 5 that communicates with the groove I as shown. The piston. 5 also has'an enlar ed squared or nut portion 5, that is provi .ed with a stop-cock 6, whereby the bore 5 can be cut off from communication with the hammer-casing, the nut ortion 5* terminating at its juncture with t emain piston 5 in the ton 5 receives a screw-plug 8, which has an annular central bore 8 communicating with the bore 5 of the piston 5 and screwed into said piston at 5 as shown, a washer 7 bein interposed between'the head of the plug 8 and the piston 5, as clearly shown in Fig. 3.

9 designates the piston-casing, which is of tubular form to receive the piston 5, and the casing 9 has an internal annular tlueaded end 9 to cooperate with the threaded portion 5 of, the piston 5 to, lock the two together, as clearly shown in Fig. 6. The piston-casing 9 has an internal chamber 9 to receive the piston 5, which has an aperture 9 to receive the threaded connection 16 from the air-pipe 11, which air-pipe has a control-valve 12, as shown. The rear end of the casing 9 is formed with a center 9 to abut a fixed support when the drill is to be used unmounted.

13 designates a clamp screwed to the easing 9 by a bolt 1-35, which clamp has a wing 13', provided with a lug 13, as shown, to be received between the cars 15 of the clamp member, to which it is secured by the bolt 14, as shown, the connection between the wing 13 and the clamp member 15 being such as 'to permit the clamp 13 being swung on the bolt 14 in one direction, as shown. The clamp 15 has a bearing portion 15 to fit into the socket portion of a clamp 16, which is held thereon by a bolt 17, as shown, and the clamp 16 is in the nature of a double clamp having a second clamping portion 16 at right angles to the clamping portion 164, and the clamping 1portion 16 is clamped around the horizonta support 19 and held secured by a bolt 18, as shown; The support 19 is in turn secured to a vertical support 20 by a clamp 19 as clearly shown in Figs. 1 and 2 The drill 25 is placed in the chuck 2, as shown, the chuck 2 and the annular flange l having alining apertures 1 12* to permit passage of the working agent from the chamber 1.

The manner in which my invention 0 er ates can be best explained as follows: he parts are assembled as shown in Fig. 1 and the stop-cock of the valve 12 is open, the valve 6 being closed, 'thus'forcing the tool into tight engagement with the rock, and the apparatus is now ready to work. The opera-' tor next opens the valve 6 to permit the working agent entering the hammer casing to reciprocate the hammer 3, the drill being turned the desired amount by means of the tus being then swung on the pivot-bolt'16 in the position shown in Fig. 2, when the drill can be drawn out, as shown in Fig. 2. It is then only necessary to insert the longer drill into the hole and swing the a )paratus back into position on the pivot-b0 t 14, when a new drill. can bepl'aced into the chuck 2 and the drilling pr oceeded with, it being understood that by reason of the connection between the clamp 13 and the member 15 the drilling-machine will always be swung up in the same alinement with the hole regardless of how many changes of drills is made. When it is desired to use my invention as a hand-drill without a mount, the hammer or casing 9 is secured ontothe piston 5. The drill then can be dismounted from the hear ing 13 and used as a hand-drill. Also, if desired, the drill can be used, by placing the screw 9 against a suitable back support and permitting the apparatus to work as before mentioned.

From the foregoing it will be seen thati V have provided a very simple and effective form of drill. thatcan be easily and quickly manipulated and will readily and-effectively serve its intended purpose and in which means are provided for keepin the drill braced against the rock being drilled, while simultaneously supplying air to operate the hammer, and in which means are provided for swinging the drilling mechanism out of alinement with the hole when it is desired to change the drill, as shown in Fig. 2. i

From the foregoing description, taken in connection with the accompanying drawings, it is thought the complete operation, construction, and many advantages of my invention will be readily understood by those skilled in the art to which it apper tains, and I desire to say that many slight changes in the detailed construction,- arran ement, and combination of parts may be mace without departing from the scope of the invention or the ap ended claims.

Having thus describe( my invention, what i claim, and desire to secure by Letters Pat ent, is j 1. An apparatusof the class described, comprising a hammer-casing, a hammer rethe front of the hammer-casing for receiving rearwardly therefrom, a piston-casing for re-.

l the the drill, a piston secured to the hammercasing at the rear thereof, a piston-casing for receiving said piston, said piston having a longitudinal channel, said hammer-casing tions, 'means for feeding working agent into the iston-casing to operate the piston and ammer, substantially as shown and described. y 2. An apparatus'of the class described, comprising a hammer-casing, and a hammer reciprocally mounted therein, a pistonsecured to the hammer-casing, and projected ceiving said piston and means for forcin said piston forward to feed the drill an simultaneously feeding working agent to the hammer-casing, and means for supporting said piston-casing, and means for swinging said piston-casing and its carried parts out of alinement with the drilled aperture at times without changin the position of the supporting means, substantially as shown and described.

3. An apparatus of the class described comprising a hammer-casing includin an internal bore, a hammer-piston reciprocal y mounted therein, a drill-receiving chuck at the front end of the hammer-casing, a piston having a porwith, said piston having a central -longi tudinal bore and a transverse bore, a valve in said longitudinal bore for controlling the same, said hammer-casing having a .pair of rearwardlys projecting arms whereby the same can be turned on its longitudinal axis,

verse channels of the piston-andwith the receiving said piston, screw connections be- Whereby they can be locked together at times, means for admitting working agent to the piston at therear of the piston-casing, and means for supporting said piston-casing, substantially as shown'and described. j,

' p v CLARK J.'SM.ITH. Witnesses:

I'ERNEST THORNTON,"

H. J. COOK-"Q tion to fit into the rear end of said hammer-' casing and having a screw connection thereinterior of the hammer-casing, for supplying working agent thereto, a piston-casing for tween said 'piston and said piston-casing and a channel communicating with the trans.- 

